System for opening and closing gas-valves from a distance.



r E. RENKEWITZ. SYSTEM FOR OPENING AND CLOSING GAS VALVES FROM A DIS'ItaNCE.

APPLIOATION PILZiD. MAY 24,1909.

. Patented J an. 3, 1911.

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E. RENKEWITZ. SYSTEM FOR OPENING AND OLOSING- GAS VALVES FROM A DISTANCE.

APPLICATION FILED MAY 24,1009.

Patented J an. 3, 1911.

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ing is a specification.

UNITED STATES PATENT OFFICE.

EMIL RENKEWITZ, 0F BERLIN, GERMANY, ASSIGNOR TO THE FIRM OF BERLIN- ANHALTISCHE MASCHINENBAU-ACTIEN-GESELLSCHAFT, OF BERLIN, GERMANY.

SYSTEM FOR OPENING AND CLOSING. GASJTALVES FROM A DISTANCE.

Specification of Letters Patent.

Patented Jan. 3,1911.

Application filed May 24, 1909. Serial No. 497,964.

-Systems for Opening and Closing Gas- Valves from a Distance, of which the follow- My invention relates to improvements in systems for opening and closing gas valves at. a distance, such as are used for lighting street lamps, and more particularly to systems in which the valve is operated by means of communicating receptacles containing a liquid, which are su ported in urastable equilibrium, and are a ternately tilte over by forcing the'liquid, by means of the\ ressure of the gas, from one receptacle int the other one.

The object of the improvements is to provide a system which is particularly simple in construction and very compact, so that the valve operatingapparatus can be di-.

rectly connected with the gas burner. For this purpose the gas controlling the roc kin movement of the receptacles is admitted thereto through an axial bore of the pivot of the receptacles, so that a special conduit adapted to follow the rocking movement of the receptacles is dispensed with.

For the purposeof excplaining the invention, two examples embo ying the same have been shown in the accompanying drawings, in which the same letters of reference have been used in all the views to indicate corresponding parts.

In said drawings-Figure 1, is a front view, partly in section, of an embodiment of the invention which is adapted for use in connection with upright burners, Fig. 2, is a side view of Fig. 1 partly in St .ztiOn taken on the line 2-2, Fig. 3, is a vertical central cross-section of Fig. 1, Figs. 4 and 5, are plans and side views illustrating the construction of the valve, Fig. 6, 1s a front view of a second embodiment of the invention which is adapted for use in connection with inverted gas burners, and Fig. 7, IS a side view of Fig. 6.

Referring particularly to the example illustrated in F igs. 15, the valve (1,, a of the burner and its operating mechanism are mounted on a casing which consists of two sections 1) and a separated from each other by a diaphragm cl so as to form two independent chambers. l/Vithin both sections '1) and. c a canal c is provided through which the gas flows to the valve a, a constructed in the form of a drum. From the canal e a canal or bore :0 is branched off through which the said canal communicates with the upper one of the chambers. The valve drum a is constructed in the form of a disk valve. It consists, as is usual, of a fittin a and: a drum a seated therein in a gas tig t manner and provided with a toothed edge a and the nozzle of the burner. The ratchet teeth a of the drum correspond to the ports of the drum a, and when the latter is rotated, as will be described hereafter, the ports provided in the fitting are closed or opened in the usual way. The diaphragm d is normally pressed against the lower face of the section. b of the casing by an adjustable spring 9, and itcloses a second canalf which, through a stuffing box it, is connected with the rocking system 12, 0, and is partly closed by a screw lug-Z provided with a minute aperture. Tlie plu Z is made hollow, and its hollow is preferabl y filled with some porous material, such as cotton, or the like,

to prevent the access of dust to the canalf and a bracket provided on the section b, the

latter receiving a pivot stud r The rocking lllOVGl'XlOIlt of the system consisting of the shaft 7) and the balls 11 and 0 is limited by means of an arm provided on the shaft 77 and rocking between stops i and 7c. \Vithin the tube '22. a sniall tube m is located which extends from the bore of the shaft 7) above the highest level of the liquid contained within the ball n, so that the canal f communicates with the said ball through the bore of lheshaft p and the tube m. The ball 0 communicates with the atmosphere through an opening a. On the shaft 72 an arm s is provided whicn carries a pawl t engaging in the ratchet teeth a of the drum a. i

In the example shown in Figs. 6 and 7, the construction of the rocking system a, 0, p is the same as that described with reference to Figs. 1 to 5. The pawl t, however, imparts rotary movement to a cock u seated in the section. b of the casing and provided with several ports corresponding to the number of the opening positions of the cock. If, in the example shown in Figs. 1 to 5, the valve drum a is in its closing position, the function of the apparatus is as follows: The illuminating gas admitted under its normal pressure passes through a branch 6 of the canal c to a pilot burner, while the chamber provided by the upper section Z) of the casing and connected with the canal 0 through the passage w is closed by the diaphragm d. If now the pressure of the gas is temporarily increased to about 10 millimeters above the normal, the diaphragm d is pressed backward against the action of the spring g, so that the canal. f is brought in conununication with the'canal cand the gas supply. Now the gas flows through the bore of the shaft and the tube m, exerts a pressure on the liquid contained within the ball a and forces the same into the ball 0, the air within the latter escaping through the aperture 2. The small amount ofgas escaping through the aperture Z under the increased pressure does not affect the function. The weight of the'liquid forced into the ball 0, causes the communicating balls a and. 0 and the parts connected therewith to perform a rocking movement. Thereby the drum a is advanced the distance of two teeth, so that the gas can flow to the burner through the ports of the drum a. If the pressure of the gas is reduced to its normal, the spring 9 presses the diaphragm cl against the opening of the canal f, so as to close the same. Now the gas contained within the ball n will slowly escape through the aperture Z, and the li uid will flow backward from the ball 0 to t e ball n, and finally the balls n and o and the parts connected therewith will be rocked into their normal position. This operation is repeated whenever the pressure is increased. In the case of the example illustrated in Figs. 6 and 7 the balls n and 0 are rocked in the same way.

The lever s advances the cock u by means I of the pawl t a distance corresponding to the distance of the opening and closing positions, whereby the passage of the gas to ,the

burner is closed or opened.

I claim: I

In a system for opening or closing gas valves, the ...combination with the main valve, and a gas supply thereto, of two receptacles communicating with each other and partly filled withaliquid, one of said receptacles being hermetically closed at its top and the other one communicating with the atmosphere, a rigid connection between said receptacles, a pivot intermediate said receptacles providing a rocking support therefor and having a bore communicating with the closed. receptacle at the upper part thereof and with the, gas supply, a spring actuated valve adapted to close the com-- munication between the gas supply and the bore of said pivot under the normal pressure of the gas and to open the same upon an increase of the pressure, the bore of said pivot communicating with the atmosphere through. a minute aperture, and a connection between the rockable receptacles and the main valve adapted to operate the latter.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

EMIL RENKEWITZ.

Witnesses i 7 I HEN RY- HAsrER, WOLDEMAR HAUPT. 

